In Star Wars: Episode II -- Attack of the Clones, set 10 years later, Obi-Wan Kenobi is now a respected Jedi Master and the mentor of Anakin Skywalker. Over the years, Anakin has grown powerful but arrogant, and believes Obi-Wan is ``holding him back''. After they save Padmé, now a senator, from an assassination attempt, Obi-Wan goes on a solo mission to trace the bounty hunters involved to the planet Kamino, where he learns of a massive clone army that the planet's inhabitants are building for the Republic. He is introduced to bounty hunter Jango Fett, the clones' template, and the two fight after Obi-Wan deduces that Fett must be behind the attempted assassination. Fett escapes to the planet Geonosis with his clone son Boba while Obi-Wan is in pursuit.

Is it true that was obi wan a master in episode 2?
yes